2-[2-(5,6-Dihydro-[1,3]dithiolo[4,5-b][1,4]dithiin-2-ylidene)-ethylidene]-[1,3]dithiole-4,5-dicarboxylic acid dimethyl ester 在
六甲基磷酰三胺 、 lithium bromide 作用下,
以40%的产率得到2-(2-[1,3]Dithiol-2-ylidene-ethylidene)-5,6-dihydro-[1,3]dithiolo[4,5-b][1,4]dithiine